﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _10_占位符
{
    class Program
    {
        static void Main(string[] args)
        {
            int n1 = 10;
            int n2 = 20;
            int n3 = 30;
            Console.WriteLine("第一个数字是：{0}，第二个数字是：{1}，第三个数字是：{2}", n1, n2, n3);
            Console.ReadKey();

        }
    }
}
